Stencil sheet



M. E. RYAN STENCIL SHEET Feb. 9, 1937.

Filed NOV. 29, 1955 INVENTOR. M4 1001: 5. RYAN, flow ATTORNEY Patented Feb. 1937 UNITED STATES PATENT OFFICE 3 Claims. (on. 41-35) My invention relates to improvements in stencil sheet assemblies.-

In the usual type of stencil consisting of a stencil sheet, a wax tissue, and a backing, there is experienced some dimculty in reading what has been out upon the stencil. The stencil sheet usually is blue in color, and the type does not make an impression which is easily readable, consequently errors are apt to slip by causing. great inconvenience, resulting in a generally unsatisfactory condition. In some types the wax tissue sheet is coated on its under side with a transfer material making a carbon copy on the backing sheet. This produces a recordof what has been cut on the stencil but since the stencil is attached to the backing at the top, this copy cannot be seen-unless the assembly is removed from the typewriter.

It is an object of invention to provide novel 1 means of construction whereby an additional carbon copy of what has been cut on a stencil may be read while the stencil assembly is still in the typewriter.

Other objects and advantages of the invention will be apparent during the course of the following description. f

In order to facilitate checking the copy, typing on whatever is'imposed upon thestencil, 1 provide an additional sheet in back of the backing sheet, and transfer means between the backing and this extra sheet so that an additional copy is provided which is easily readable.

In the drawing forming a part hereof- Figure 1 is a perspective view of a stencil sheet inserted in a typewriter,

Figure 2 is a front perspective view of a stencil assembly partially broken away to show a section through it, and

Figure 3 is a rear perspective view of the The perforate line I I in the backing sheet "6- serves to divide the hacking into two parts, a small upper stub portion 20, and larger lower portion 2|. Located in the stub portion 20 are the usual openings III to engage hooks on a mimeograph machine.

The stencil sheet 4 and wax tissue sheet 5 are to provide means for severing it from the backing attached to the backing sheet stub portion 20 along their top margins at 22 along the perforate line H. The wax tissue-sheet 5 mayor may not be used. I

, The side of backing sheet 6 which faces toward 5 the typewriter platen 16 is either coated with some suitable transfer medium 8 or has fastened to it a sheet of carbon paper 8.- In the drawing I have illustrated the transfer medium 8 as a" separate carbon sheet attached at 23 to the severable backing portion 2|. The surface thus covered need not exceed the workable area of stencil sheet 4, thus, the transfer medium will lie somewhere between the perforate line H and the bottom of the backing 2|. v v a The plain sheet 1 I have illustrated as'attached to the hacking portion 2| at both top and bottom. I do not wish to be limited, however, to this form for I may attach it only at the bottom, top,- or on one side, or indeed, not attach it at all, so 2 long as it is put in place between the platen l6 and the carbonized face 8 of backing sheet 6. In those instances where it is attached at the top, as illustrated, or at the sides, it is important 25 portion 2|. -This is preferably done after the stencil assembly is in the writing machine and has been turned up far enough to expose the line of perforations B. In Figure 3 Ihave shown two although not so convenient to use. Where sheet I is fastened to the bottom of backing portion 2| a row of perforations l5 permit easy separa- 35 tion therefrom.

In Figure 1, the stencil including the stencil sheet 4, the backing 5, the extra plain sheet I and carbon surface 8 is shown inserted in a typewriter. The yp writer parts shown consist of 40 the usual platen li mounted on the shaft II, on the ends of which are the usual turning obs (not shown). Beneath it is the paper feed-in guide and support l8. As shown, the sheet I has been separated from the stencil assemblyalong 45 the line l3, and leaves the carbon copy thereon "open to inspection without taking the assembly out of the machine, as would be necessary'if the carbon copy were made on the front of backing sheet 2|, or on the thin tissue 5. Consequently, by the use of my invention Iaprovide a relatively I clear carbon, copy of what has been cut on. the

' stencil which may be seen without removing the stencil assembly from the typewriter, thereby minimizing the chance of making errors caused by attempting to proof read the dimimpression made on the stencil sheet. In addition, I provide an accurate record of the stencil sheet which the machine and the backing sheet torn along perforations II which formsthe upper stub portion to whichthe stencil is attached. Backing sheet I is then torn along perforations l5.

On this sheet I is a carbon copy of the material van cut on the stencil sheet.

The backing sheet section 2| may have the usual markings, line numbers, or other information generally printed on these sheets. It may be desirable also to have the same information printed upon the rear plain sheet I as additional help to the operator in locating the work upon the stencil when making corrections.

While I have shown and described one embodiment of my invention, it is obvious that the parts'may be varied and still retain my invention and come withinthe scope of the subjoined claims:-

1. In a stencil sheet assembly adapted for insertion in a writing machine having a platen,

the combination of a backing sheet having spaced openings near one of its ends, a row of perforations extending from side to side near said openings, and copy transferring material covering the major portion of one of thesurfaces between said perforations and its other end, a stencil sheet 'attached to said backing sheet between said openings and said perforations on the side opposite to that having said transferring material, and a plain sheet attached to said backing sheet on theside having said transferring material, said sheet having a weakened portion to facilitate severing it from said backing shee't near its point of attachment thereto when the stencil is in place in the writing machine whereby the copy made on said plain sheet may be inspected without removing said assembly from said writing machine, said assembly being characterized by having said sheets unconnected except at the top, whereby, as they are fed over the platen. they are not caused to wrinkle or gather, but

can move relative to each other to compensate for their different rates of travel.

2. A stencil assembly adapted for insertion in a writing machine having a. platen, comprising a backing sheet, a plain sheet, a carbon sheet between the aforementioned sheets, a wax tissue sheet and a stencil sheet, said wax tissue ,sheet being positioned between said stencil and backing sheets, all of said sheets except said wax tissue sheet being secured as a unit at or near their top-edges and being unsecured at their bottom edges whereby they may be passed over said platen without wrinkling or gathering, said backing sheet being characterized by having spaced openings adjacent its top edge, having a row of perforations extending from side to side near said openings, and having said stencil sheet secured to it between said openings and said row of perforations and having said carbon sheet and plain sheet secured on its opposite side below said row of perforations, and said plain sheet having a row of perforations extending from side to side adjacent its point of attachment to said backing, whereby said plain sheet may be separated from said assembly by severing along said row of perforations.

3. A stencil assembly adapted for insertion in a writing machine having a platen, comprising a backing sheet having one surface covered by a copy making material, a plain sheet overlying said covered surface, and a stencil sheet, all of said sheets being secured as a unit at or near their top edges and being unsecured at their bottom edges whereby they may be passed over said platen without wrinkling or gathering, said backing sheet being characterized by having spaced openings adjacent its top edge, having a row of perforations extending from side to side near said openings, and having said stencil sheet secured to it between said openings and said row of perforations and having said plain sheet secured on its opposite side below said row of perforations, and said plain sheet having a row of perforations extending from side to side adjacent its point of attachment to said backing, whereby said plain sheet may be separated from said assembly by severing along said row of perforations. j

' MARJORIE E. RYAN. 

